SAE correction vs DIN correction?
12-21-2009, 07:25 PM
#11
ATGATT
Thread Starter
Join Date: Nov 2008
Location: Wangan
Posts: 10,477
Likes: 0
Received 0 Likes
on
0 Posts
Re: SAE correction vs DIN correction?
That's the kind of stuff I'm talking about. Without knowing what both correction equations are, it's hard to get to the bottom of it. DIN and SAE might have different drivetrain corrections, etc. Both are actually supposed to be HP at the crank if I remember, so it's very possible that the corrections for loss are different.
12-21-2009, 07:32 PM
#12
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: SAE correction vs DIN correction?
There are other correction factors for driveline losses. SAE and DIN just correct for ambient conditions. The driveline loss numbers can be a big fudge factor though, but they're supposed to be constants based on the type of drivetrain (just so HP numbers are comparable, not because the drivetrain constants are accurate). It's really hard to actually characterize drivetrain losses though, so it's really hard to accurately predict (intentional word choice) what the engine HP is based on the output to the wheels. That's one of the reasons I've always been a fan of RotoTest and DynaPack dynos; they get rid of a lot of friction variables.
Last edited by Fabrik8; 12-21-2009 at 07:41 PM.
Thread
Thread Starter
Forum
Replies
Last Post
japslapr
Automotive Discussion
13
03-17-2008 04:14 PM
ssteg117
Want to Buy / Trade ARCHIVE
1
08-16-2007 04:16 AM